Hehe,

Yes! First one!

Anyway, the SCP, just download the latest EXE (you can find it in the sub-forum at the top of the main forum). It's refered to as the SCP, not the OS, and all campaigns can use it

FRED, you can get a new SCP version as well. If you want to start modding at all, you have to get the VPView Toolkit from
www.freespace-2.com. Check the Wiki for more info. Table files store all the ship info that Freespace uses.
To install mods, well, just stick the textures in the maps directory, tables in tables, etc, etc. Generally, however, the big campaigns, like Inferno, come with an installer.
BTW, you will need a launcher for the SCP, which you can get in the SCP forum
